On Wed, 26 May 1993 10:10:42 EDT [log in to unmask] said:
 
>The enclosed mail file, found in the  MUTEST reader and shown under the spoolid
>6821  in the  console log,  has been  identified as  a possible  delivery error
>notice for the following reason: mail origin is listed in "Filter=" list header
>keyword (or its default value for MUTEST).
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
>I do not have a Filter= keyword in any of my lists.
 
No, but it has a default value. See the 1.7f release notes.
 
  Eric